If you discover that someone has taken a video from your own video platform without your permission and is sharing or distributing it, you may consider consulting a lawyer. TradeCast cannot provide legal advice, but can point you to resources you can use to enforce your rights. One of the easiest of these is to initiate proceedings under the Digital Millennium Copyright Act (DMCS).
The Digital Millennium Copyright Act (DMCA) is a U.S. law established in 1998. The DMCA criminalizes the production and dissemination of technology or services designed to circumvent digital security measures that govern access to a copyrighted work. Under the DMCA, the owner of a website may be ordered to remove infringing content, a so-called 'takedown notice'.
You can find more information about the DMCA on the official DMCA website.